CN108490032A - A kind of chlorine residue on-line detecting system - Google Patents
A kind of chlorine residue on-line detecting system Download PDFInfo
- Publication number
- CN108490032A CN108490032A CN201810559325.1A CN201810559325A CN108490032A CN 108490032 A CN108490032 A CN 108490032A CN 201810559325 A CN201810559325 A CN 201810559325A CN 108490032 A CN108490032 A CN 108490032A
- Authority
- CN
- China
- Prior art keywords
- flow
- inner cavity
- detection
- inner chamber
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
A kind of chlorine residue on-line detecting system, it include integrated package, water inlet, water outlet and water stream channel are provided on integrated package, residual chlorine sensor is connected on water stream channel, water stream channel is provided with flow control node, pH value detection node, chlorine residue detection node, and water stream channel includes first inner chamber, second inner chamber and third inner cavity；Flow control node includes flow nail；Flow control node further includes having metal detection inductor, and metal detection inductor is connected with controller, and third inner cavity is provided with detection inner cavity, and residual chlorine sensor setting is in detection inner cavity.The uninterrupted that user adjusts water inlet flow can make flow nail positioned at the investigative range of metal detection sensor, at this time the flow rate of water flow stabilization in water stream channel, to the interference for overcoming flow rate of water flow to detect chlorine residue；Flow can flow through detection inner cavity when entering third inner cavity, flow is fully contacted with residual chlorine sensor in detecting inner cavity, greatly improve the accuracy of detection flowing flow contents of residual chlorine.
Description
Technical field
The present invention relates to a kind of monitoring devices, and in particular to a kind of chlorine residue on-line detecting system.
Background technology
Water is Source of life, and the mankind be unable to do without in life and production activity, and the quality of water quality directly determines people
Quality of life, domestic water generally use throws chlorine into water and carries out disinfection processing, after chlorine is put into water, in addition to it is thin in water
The effects that bacterium, microorganism, organic matter, inorganic matter, consumes outside a part of chlorine dose, there remains a part of chlorine dose, this part chlorine dose is just
It is called chlorine residue.
Application No. is the Chinese patent documents of 201711006013.X to disclose a kind of Water quality monitoring device, includes
PH value sensor node, ammonia nitrogen sensor node, water flow pipes；Transmission antenna, control box, display, reception antenna, water flow pipes packet
Be rolled in pH value sensor, lambda sensor, residual chlorine sensor, among ammonia nitrogen sensor, and pH value sensor node, lambda sensor
Node, residual chlorine sensor node, ammonia nitrogen sensor node are packaged into waterproof construction, and the transmission antenna of waterproof is exposed at waterproof construction
Outside；Control box surface is equipped with display, and reception antenna is equipped with above display；It is pH value sensor node, lambda sensor node, remaining
Chlorine sensor node.
In above-mentioned technical proposal, water body detection device is mounted on water pipe, water quality is examined by various sensors
It surveys, the control box that the signal of acquisition is sent in real time and display, but is unable to control the flow velocity of flow in water body detection process
Cause flow and residual chlorine sensor node contact insufficient, testing result is had an impact, there are improvements for the prior art.
Invention content
In order to solve the above technical problems, the present invention proposes a kind of chlorine residue on-line detecting system, when water flows through first inner chamber,
The pressure of flow makes flow nail move upwards, and metal detection inductor senses flow after flow, which nails on, rises to equilibrium state
Nail, the height followed closely by flow can reflect the flow velocity of flow, and flow fully connects with residual chlorine sensor after entering detection inner cavity
It touches, ensures that residual chlorine sensor detects the validity of data, greatly improve the accuracy of detection flowing flow contents of residual chlorine.
In order to achieve the above objectives, technical scheme is as follows：A kind of chlorine residue on-line detecting system, includes integrated
Block is provided with water inlet, water outlet and water stream channel on the integrated package, and chlorine residue sensing is connected on the water stream channel
Device, the water stream channel are disposed with flow control node, pH value detection node, chlorine residue detection node along water flowing direction,
The water stream channel includes first inner chamber, second inner chamber and third inner cavity；
The flow control node includes that flow is arranged in first inner chamber to follow closely, and the first inner chamber is connected to water inlet
And be vertically arranged, the flow nail is slidably arranged in first inner chamber, when the first inner chamber has stationary flow,
The flowing nail is stable in the first inner chamber；The flow control node further includes having to be arranged on integrated package for incuding
The metal detection inductor of flow nail position in the first inner chamber, the metal detection inductor is connected with to be thrown for controlling chlorine
The controller for putting speed, when the metal detection inductor does not collect flow nail, the controller stops the dispensing of chlorine；
The pH value detection node includes that pH value sensor is arranged in the second inner chamber；
The third inner cavity is provided with detection inner cavity, and the residual chlorine sensor setting is in detection inner cavity, the third inner cavity
It is connect with water outlet.
By using above-mentioned technical proposal, flow enters from water inlet in first inner chamber, and pressure when flow flows makes the
Flow nail in one inner cavity overcomes gravity to move upwards until stress balance, and flow nail is suspended in first inner chamber at this time, is used
Person adjusts the investigative range that the uninterrupted of water inlet flow can make flow nail be located at metal detection sensor, at this time flow
Flow rate of water flow in channel is stablized, to the interference for overcoming flow rate of water flow to detect chlorine residue；Flow enters pH value after second inner chamber
Sensor detects the acid-base value of flow using the compensation numerical value as contents of residual chlorine；Flow can flow through in detection when entering third inner cavity
Chamber, flow fully contact with residual chlorine sensor in detecting inner cavity, ensure the measured value of residual chlorine sensor, pass through flow control
The cooperation of node and detection inner cavity makes the flow velocity of water stream channel keep relative stability and ensures that flow fully connects with residual chlorine sensor
It touches, greatly improves the accuracy of detection flowing flow contents of residual chlorine.
The present invention is further arranged to：Restricted flow passage is provided between the water inlet and first inner chamber, the current limliting is logical
Regulating valve is provided in road.
By using above-mentioned technical proposal, the stream for flowing into first inner chamber flow is can be adjusted by restricted flow passage and regulating valve
Speed, with applied to the use environment that can not adjust water inlet side flow.
The present invention is further arranged to：The length direction of the restricted flow passage is perpendicular to the first inner chamber, the adjusting
Valve includes the spool being arranged along restricted flow passage length direction sliding and the adjusting being threadedly connected on the integrated package
Head, the spool is wedge shaped to be arranged and is plugged in the restricted flow passage, and the spool is along the limit after the adjusting head rotation
The length direction of circulation road slides.
By using above-mentioned technical proposal, user adjusts head by rotation can be such that spool is slided along restricted flow passage, lead to
The valid circulation area of the spool adjustment restricted flow passage of wedge shape setting is crossed so as to adjust the flow velocity size of first inner chamber flow is flowed into.
The present invention is further arranged to：It is provided with relief port and eduction valve between the second inner chamber and third inner cavity.
By using above-mentioned technical proposal, flow is flowed out by relief port in order to which user collects detection sample and integrates
The numerical value that residual chlorine sensor acquires on block is compared, convenient for correction in actual use.
The present invention is further arranged to：The detection inner cavity has first interface, second interface and third interface, described
First interface, second interface are connect with third inner cavity, and the third interface thread is connected with residual chlorine sensor, and the chlorine residue passes
Sensor includes chlorine residue electrode, and the chlorine residue electrode is located at intracavitary in the detection.
By using above-mentioned technical proposal, residual chlorine sensor is connect with third interface thread, is on the one hand connected through a screw thread
Residual chlorine sensor third interface is closed, make detection inner cavity keep closed state, so that flow is come into full contact with residual chlorine sensor,
On the other hand the residual chlorine sensor being threadedly coupled is easy to disassemble, reduces the maintenance difficulties during use.
The present invention is further arranged to：The first interface is arranged far from water outlet side, is arranged at the first interface
There is flow-stopping plate, forms drainage channel between the flow-stopping plate and the inner wall of the detection inner cavity, water flows through edge after the flow-stopping plate
The inner wall flowing of the detection inner cavity.
By using above-mentioned technical proposal, water flows through drainage channel and enters detection inner cavity and along the inner wall stream of detection inner cavity
It is dynamic, so that flow is formed irregular flow in detecting inner cavity, to increase the contact probability of flow and chlorine residue electrode, to carry
The accuracy that high residual chlorine sensor measures.
In conclusion the present invention has the following effects that：
1, chlorine residue on-line detecting system adjusts the dispensing speed of chlorine residue according to residual chlorine sensor in use, works as flow
After stopping, what the flow stopping flowing residual chlorine sensor in water stream channel still detected is the water detected in inner cavity, after flow stops,
Flow nail is detached from the acquisition range of metal detection inductor by gravity, and controller stops the dispensing of chlorine, avoids chlorinity in water super
Mark；
2, chlorine residue electrode can be washed away by detecting irregular flow in inner cavity, and extension chlorine residue electrode is clear due to build-up of limescale
The time is washed, to extend the period of residual chlorine sensor cleaning.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described.
Fig. 1 is the overall structure diagram of chlorine residue on-line detecting system；
Fig. 2 is the internal structure schematic diagram of chlorine residue detecting system；
Fig. 3 is the structural schematic diagram for detecting inner cavity.
In figure：1, integrated package；11, water inlet；12, water outlet；13, water stream channel；131, first inner chamber；132, in second
Chamber；133, third inner cavity；134, restricted flow passage；135, relief port；2, flow control node；21, flow is followed closely；22, metal detection
Inductor；3, controller；4, delivery device；5, pH value sensor；6, chlorine residue detection node；61 residual chlorine sensors；611, chlorine residue
Electrode；62, inner cavity is detected；621, first interface；622, second interface；623, third interface；7, regulating valve；71, head is adjusted；
72, spool；8, eduction valve；9, flow-stopping plate；91, drainage channel.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings.
As depicted in figs. 1 and 2, a kind of chlorine residue on-line detecting system includes integrated package 1, is provided on integrated package 1 into water
Mouthfuls 11, water outlet 12 and water stream channel 13 are connected with residual chlorine sensor 61 on water stream channel 13, and the water stream channel 13 is along water
Flow direction is disposed with flow control node 2, pH value detection node, chlorine residue detection node 6, and water stream channel 13 includes
One inner cavity 131, second inner chamber 132 and third inner cavity 133；Flow control node 2 includes setting stream in first inner chamber 131
Amount nail 21, first inner chamber 131 is connected to water inlet 11 and is vertically arranged, and flow nail 21 is slidably arranged in first inner chamber
In 131, when first inner chamber 131 has stationary flow, flowing nail is stable in the first inner chamber 131；Flow control node 2
Further include having the metal detection inductor for being arranged on integrated package 1 and following closely 21 positions for incuding flow in the first inner chamber 131
22, metal detection inductor 22 is connected with the controller 3 that speed is launched for controlling chlorine, and controller 3 connects to be launched in oriented water
The delivery device 4 of chlorine, when metal detection inductor 22 does not collect flow nail 21, controller 3 stops the dispensing of chlorine, is formed
Negative-feedback regu- lation mechanism avoids the lasting chlorine of being launched into water of delivery device 4 after cutting off the water from being severely exceeded with caused chlorinity；PH value
Detection node includes that pH value sensor 5 is arranged in the second inner chamber 132；
Third inner cavity 133 is provided with detection inner cavity 62, and the setting of residual chlorine sensor 61 is in detection inner cavity 62, third inner cavity 133
It connect, is provided between second inner chamber 132 and third inner cavity 133 convenient for the aerial drainage of user's acquisition testing sample with water outlet 12
Mouth 135 and eduction valve 8.
For the ease of user adjust flow nail 21 first inner chamber 131 height, water inlet 11 and first inner chamber 131 it
Between be provided with restricted flow passage 134, regulating valve 7 is provided in restricted flow passage 134, the length direction of restricted flow passage 134 is perpendicular to
One inner cavity 131, regulating valve 7 include the spool 72 being arranged along the sliding of 134 length direction of restricted flow passage and are threadedly connected to collection
Adjusting head 71 on blocking 1, the wedge shaped setting of spool 72 are simultaneously plugged in the restricted flow passage 134, adjust valve after head 71 rotates
Core 72 is slided along the length direction of restricted flow passage 134.
In conjunction with shown in Fig. 3, detection inner cavity 62 have first interface 621, second interface 622 and third interface 623, first
Interface 621, second interface 622 are connect with third inner cavity 133, and third interface 623 is threaded with residual chlorine sensor 61, chlorine residue
Sensor 61 includes chlorine residue electrode 611, and chlorine residue electrode 611 is located in detection inner cavity 62；First interface 621 is far from water outlet 12
Side is arranged, and flow-stopping plate 9 is provided at first interface 621, and drainage channel 91 is formed between flow-stopping plate 9 and the inner wall of test chamber,
Water flows after flowing through flow-stopping plate 9 along the inner wall for detecting inner cavity 62.
Specific implementation process：
Flow enters from water inlet 11 in first inner chamber 131, and pressure when flow flows makes the flow in first inner chamber 131
Nail 21 overcomes gravity to move upwards until stress balance, and flow nail 21 is suspended in first inner chamber 131 at this time, and user is by turning
Regulating valve 7 is moved to adjust the flow velocity that flow flows into first inner chamber 131, to which flow nail 21 is located at the detections of metal detection sensor
Range, at this time flow rate of water flow in water stream channel 13 stablize；PH value sensor 5 detects flow after flow enters second inner chamber 132
Acid-base value using the compensation numerical value as contents of residual chlorine；Flow can flow through detection inner cavity 62 when entering third inner cavity 133, flow exists
It flows into and detects the inner wall flowing that inner cavity 62 makes direction detect inner cavity 62, the flow in detection inner cavity 62 is made irregularly to flow to make
Flow is fully contacted with residual chlorine sensor 61, ensures the measured value of residual chlorine sensor 61.
It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the premise of the invention,
Various modifications and improvements can be made, these are all within the scope of protection of the present invention.
Claims (6)
1. a kind of chlorine residue on-line detecting system includes integrated package (1), it is provided with water inlet (11) on the integrated package (1), goes out
The mouth of a river (12) and water stream channel (13) are connected with residual chlorine sensor (61) on the water stream channel (13), which is characterized in that institute
It states water stream channel (13) and is disposed with flow control node (2), pH value detection node, chlorine residue detection node along water flowing direction
(6), the water stream channel (13) includes first inner chamber (131), second inner chamber (132) and third inner cavity (133)；
The flow control node (2) includes that setting follows closely (21) in the interior flow of first inner chamber (131), the first inner chamber
(131) it is connected to water inlet (11) and is vertically arranged, the flow nail (21) is slidably arranged in first inner chamber (131)
In, when the first inner chamber (131) has stationary flow, the flowing nail is stable in the first inner chamber (131)；It is described
Flow control node (2) further includes having to be arranged on integrated package (1) for incuding the interior flow nail (21) of the first inner chamber (131)
The metal detection inductor (22) of position, the metal detection inductor (22) are connected with the control that speed is launched for controlling chlorine
Device (3), when the metal detection inductor (22), which does not collect flow, follows closely (21), the controller (3) stops the throwing of chlorine
It puts；
The pH value detection node includes pH value sensor (5) setting in the second inner chamber (132)；
The third inner cavity (133) is provided with detection inner cavity (62), and residual chlorine sensor (61) setting is detecting inner cavity (62),
The third inner cavity (133) connect with water outlet (12).
2. a kind of chlorine residue on-line detecting system according to claim 1, which is characterized in that the water inlet (11) and first
It is provided with restricted flow passage (134) between inner cavity (131), regulating valve (7) is provided in the restricted flow passage (134).
3. a kind of chlorine residue on-line detecting system according to claim 2, which is characterized in that the restricted flow passage (134)
For length direction perpendicular to the first inner chamber (131), the regulating valve (7) includes along the restricted flow passage (134) length side
The spool (72) being arranged to sliding and the adjusting head (71) being threadedly connected on the integrated package (1), the spool (72) are in
Wedge shape is arranged and is plugged in the restricted flow passage (134), and the spool (72) is along the limit after adjusting head (71) rotation
The length direction of circulation road (134) slides.
4. a kind of chlorine residue on-line detecting system according to claim 1, which is characterized in that the second inner chamber (132) with
Relief port (135) and eduction valve (8) are provided between third inner cavity (133).
5. a kind of chlorine residue on-line detecting system according to claim 4, which is characterized in that the detection inner cavity (62) has
First interface (621), second interface (622) and third interface (623), the first interface (621), second interface (622)
It is connect with third inner cavity (133), the third interface (623) is threaded with residual chlorine sensor (61), the chlorine residue sensing
Device (61) includes chlorine residue electrode (611), and the chlorine residue electrode (611) is located in the detection inner cavity (62).
6. a kind of chlorine residue on-line detecting system according to claim 5, which is characterized in that the first interface (621) is remote
The setting of the mouth of a river (12) side is separated out, flow-stopping plate (9), the flow-stopping plate (9) and the inspection are provided at the first interface (621)
It surveys between the inner wall of inner cavity (62) and forms drainage channel (91), water flows through after the flow-stopping plate (9) along the detection inner cavity (62)
Inner wall flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559325.1A CN108490032A (en) | 2018-06-01 | 2018-06-01 | A kind of chlorine residue on-line detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559325.1A CN108490032A (en) | 2018-06-01 | 2018-06-01 | A kind of chlorine residue on-line detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108490032A true CN108490032A (en) | 2018-09-04 |
Family
ID=63341948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810559325.1A Pending CN108490032A (en) | 2018-06-01 | 2018-06-01 | A kind of chlorine residue on-line detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108490032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412077A (en) * | 2019-08-27 | 2019-11-05 | 广州泰道安医疗科技有限公司 | A kind of effective chlorine on-line measuring device of chlorine-containing disinfectant fluid production |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092707U (en) * | 1991-05-27 | 1992-01-08 | 煜丰企业有限公司 | Flow measuring valve |
| US20040219683A1 (en) * | 2000-02-11 | 2004-11-04 | Severn Trent Water Purification Inc. | Method of measuring chlorine content in aqueous solution |
| CN204903519U (en) * | 2015-07-20 | 2015-12-23 | 厦门市科宁沃特水处理科技股份有限公司 | Integration water quality testing equipment |
| CN105271474A (en) * | 2015-11-04 | 2016-01-27 | 辛爱香 | Medical raw water residual chlorine on-line detection control device |
| CN205991956U (en) * | 2016-08-02 | 2017-03-01 | 安徽泛亚环保科技有限公司 | A kind of online chlorine residue detection means |
| CN107697991A (en) * | 2017-11-21 | 2018-02-16 | 北京金惠昌科技发展有限公司 | A kind of accurate dosing system of running water chlorine residue and its control method with closed-loop control |
| CN207133223U (en) * | 2017-09-20 | 2018-03-23 | 昆山三泽仪器有限公司 | Compound chlorine residue flow cell and chlorine residue detection means |
| CN207133232U (en) * | 2017-09-20 | 2018-03-23 | 昆山三泽仪器有限公司 | Chlorine residue detection means |
-
2018
- 2018-06-01 CN CN201810559325.1A patent/CN108490032A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092707U (en) * | 1991-05-27 | 1992-01-08 | 煜丰企业有限公司 | Flow measuring valve |
| US20040219683A1 (en) * | 2000-02-11 | 2004-11-04 | Severn Trent Water Purification Inc. | Method of measuring chlorine content in aqueous solution |
| CN204903519U (en) * | 2015-07-20 | 2015-12-23 | 厦门市科宁沃特水处理科技股份有限公司 | Integration water quality testing equipment |
| CN105271474A (en) * | 2015-11-04 | 2016-01-27 | 辛爱香 | Medical raw water residual chlorine on-line detection control device |
| CN205991956U (en) * | 2016-08-02 | 2017-03-01 | 安徽泛亚环保科技有限公司 | A kind of online chlorine residue detection means |
| CN207133223U (en) * | 2017-09-20 | 2018-03-23 | 昆山三泽仪器有限公司 | Compound chlorine residue flow cell and chlorine residue detection means |
| CN207133232U (en) * | 2017-09-20 | 2018-03-23 | 昆山三泽仪器有限公司 | Chlorine residue detection means |
| CN107697991A (en) * | 2017-11-21 | 2018-02-16 | 北京金惠昌科技发展有限公司 | A kind of accurate dosing system of running water chlorine residue and its control method with closed-loop control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412077A (en) * | 2019-08-27 | 2019-11-05 | 广州泰道安医疗科技有限公司 | A kind of effective chlorine on-line measuring device of chlorine-containing disinfectant fluid production |
| CN110412077B (en) * | 2019-08-27 | 2024-04-26 | 广州泰道安医疗科技有限公司 | Effective chlorine on-line measuring device that chlorine-containing sterilized water production was used |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107389160B (en) | Detection device and detection method for detecting gas meter card | |
| CN106620901A (en) | Self-adaption encephalic cerebrospinal fluid drainage device | |
| CN203941133U (en) | Ammonia content on-line monitoring system in a kind of boiler water of electric power plant | |
| EP1792734A3 (en) | Liquid container | |
| CN108490032A (en) | A kind of chlorine residue on-line detecting system | |
| CN205643314U (en) | Gaseous composition sensor probe of integrated form and detection structure | |
| CN205506808U (en) | Oxygen absorption rate on -line measuring device | |
| CN208672552U (en) | A kind of chlorine residue on-line detecting system | |
| CN206414576U (en) | A kind of atomizer | |
| CN217846277U (en) | Turbidimeter capable of automatically removing bubbles | |
| CN207133223U (en) | Compound chlorine residue flow cell and chlorine residue detection means | |
| CN207541061U (en) | A kind of water supply detecting and controlling system | |
| CN208953082U (en) | Liquid level detection device and rinse-system | |
| CN114873663B (en) | Sewage treatment equipment and sewage treatment method | |
| CN209653031U (en) | A kind of auxiliary agent auto feed stable water pressure control system | |
| CN207133232U (en) | Chlorine residue detection means | |
| CN204649259U (en) | A kind of device adopting direct drainage measurement gas volume | |
| CN208672672U (en) | A kind of anemobiagraph calibrating installation | |
| CN204705497U (en) | A kind of liquid flow measurement system | |
| CN207396396U (en) | A kind of high temperature resistant pH meter on-line detector | |
| CN2552005Y (en) | COD (chemical oxygen demand) all quantity on-line monitor | |
| CN206848221U (en) | It is used for the device for checking flow index of correlation in a kind of liquid chromatograph calibrating | |
| CN206601157U (en) | A kind of adjustable gas flowmeter of resolution ratio | |
| CN205671109U (en) | A kind of greenhouse aqueous vapor pressure reduction automatic regulating system | |
| CN211586059U (en) | Intelligent micro-nano bubble machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |